Valid argument forms (relevant) Flashcards
Modus Ponens
Argument with a conditional premise and a premise that affirms the antecedent
What does Modus Ponens mean?
Mode that affirms
Modus Tollens
Argument has a conditional premise and a premise that denies the consequent
What does Modus Tollens conclude?
That the antecedent must be denied
What does Modus Tollens mean?
Mode that denies
Modus Tollens argument form
If p, then q, not q, so not p
Modus Ponens argument form
If p, then q, p, so q
What are modus ponens and modus tollens?
Valid
Necessary conditions
Necessary conditions (B) are what something must have to be an A. In other words, necessary conditions are conditional: if A then B
Sufficient conditions
Sufficient conditions (B) are enough for something to be an A. In other words, sufficient conditions are a conditional: if B then A
Criticisms of a conceptual analysis
Circular, too weak, too strong
Circular
It includes part of itself
Too weak
It includes too many things
Too strong
It includes too few things
A is a sufficient condition for B if
B then A